AOC LM-729 Service Manual
AOC LM-729 Service Manual

AOC LM-729 Service Manual

17” lcd monitor
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英华软件专用 购买QQ:505966338
LM-729 Service Manual
Rev: A

SERVICE MANUAL

17" LCD Monitor
LM-729
THESE DOCUMENTS ARE FOR REPAIR SERVICE INFORMATION ONLY. EVERY REASONABLE
EFFORT HAS BEEN MADE TO ENSURE THE ACCURACY OF THIS MANUAL; WE CANNOT
GUARANTEE THE ACCURACY OF THIS INFORMATION AFTER THE DATE OF PUBLICATION
AND DISCLAIMS RE LIABILITY FOR CHANGES, ERRORS OR OMISSIONS.
Page 1 of 61 

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Summary of Contents for AOC LM-729

  • Page 1: Service Manual

    英华软件专用 购买QQ:505966338 LM-729 Service Manual Rev: A SERVICE MANUAL 17” LCD Monitor LM-729 THESE DOCUMENTS ARE FOR REPAIR SERVICE INFORMATION ONLY. EVERY REASONABLE EFFORT HAS BEEN MADE TO ENSURE THE ACCURACY OF THIS MANUAL; WE CANNOT GUARANTEE THE ACCURACY OF THIS INFORMATION AFTER THE DATE OF PUBLICATION AND DISCLAIMS RE LIABILITY FOR CHANGES, ERRORS OR OMISSIONS.
  • Page 2 英华软件专用 购买QQ:505966338 LM-729 Service Manual Rev: A Prepared: Shiwei Date: Jul-30-03 Page 2 of 61 ...
  • Page 3 英华软件专用 购买QQ:505966338 LM-729 Service Manual Rev: A Revision History Revision Date Page Items Modification First version release; Date:Jul-30-03 Page 3 of 61 ...
  • Page 4: Table Of Contents

    英华软件专用 购买QQ:505966338 LM-729 Service Manual Rev: A Table of Contents Table of Contents ---------------------------------------------------------------------------------------------------3 1. MONITOR SPECIFICATIONS ---------------------------------------------------------------------------5 2. LCD MONITOR DESCRIPTION ---------------------------------------------------------------------------6 3. OPERATING INSTRUCTIONS ---------------------------------------------------------------------------7 3.1 GENERAL INSTRUCTIONS -------------------------------------------------------------------------7 3.2 CONTROL BUTTONS ------------------------------------------------------------------------------------7 3.3 ADJUSTING THE PICTURE--------------------------------------------------------------------------------7 4. Input/Output Specification - -------------------------------------------------------------------------------10 4.1 Input Signal Connector...
  • Page 5 英华软件专用 购买QQ:505966338 LM-729 Service Manual Rev: A 5.3.2 Inverter/Power Board -------------------------------------------------------------------------------------19 6. Schematic -------------------------------------------------------------------------------------------------------21 6.1 Main Board -----------------------------------------------------------------------------------------------21 6.2 AUDIO Board -----------------------------------------------------------------------------------------25 6.3 Key Board ------------------------------------------------------- ---------------------------------------26 6.4 Inverter/Power Board -----------------------------------------------------------------------------------27 7. PCB Layout -------------------------------------------------------------------------------------------------29 7.1 Main Board -----------------------------------------------------------------------------------------------29 7.2 Inverter/Power Board -----------------------------------------------------------------------------------31 7.3 Keypad Board And Audio board-------------------------------------------------------------------------34...
  • Page 6: Monitor Specifications

    英华软件专用 购买QQ:505966338 LM-729 Service Manual Rev: A 1.MONITOR SPECIFICATIONS Driving system TFT Color LCD LCD Panel Size 43.2cm(17.0") Pixel pitch 0.264mm( H )x 0.264mm( V ) Viewable angle 90˚ (H) 90˚ (V) Response time (typ.) 25 ms Video Analog /Digital Input Sync.
  • Page 7: Lcd Monitor Description

    英华软件专用 购买QQ:505966338 LM-729 Service Manual Rev: A 2. LCD MONITOR DESCRIPTION The LCD MONITOR will contain a main board, an inverter/power board, keypad board , Audio board and external power adapter which house the flat panel control logic, brightness control logic and DDC.
  • Page 8: Operating Instructions

    英华软件专用 购买QQ:505966338 LM-729 Service Manual Rev: A 3. OPERATING INSTRUCTIONS 3.1 GENERAL INSTRUCTIONS Press the power button to turn the monitor on or off. The other control buttons are located at front panel of the monitor. By changing these settings, the picture can be adjusted to your personal preferences.
  • Page 9 英华软件专用 购买QQ:505966338 LM-729 Service Manual Rev: A OSD Table: Description Main Main Sub Menu Adjust Reset Value Menu Item Menu Icon Item Menu Range Icon Luminance Contrast Contrast from Digital-register. 0-100 Recall Cool Contrast Value Brightness Backlight Adjustment 0-100 Recall Cool...
  • Page 10 英华软件专用 购买QQ:505966338 LM-729 Service Manual Rev: A Language English Set OSD display language to The Language will English. be set to English. Deutsch Set OSD display language to German. Français Set OSD display language to French. Español Set OSD display language to Spain.
  • Page 11: Input/Output Specification

    英华软件专用 购买QQ:505966338 LM-729 Service Manual Rev: A 4. Input/Output Specification 4.1 Input Signal Connector 4.1.1 Analog D-SUB Connector PIN NO. DESCRIPTION DESCRIPTION PI N NO. Green Detect Cable Blue Ground DDC-Serial Data Ground H-Sync R-Ground V-Sync G-Ground DDC-Serial Clock B-Ground VGA connector layout 4.1.2 DVI-D Connector...
  • Page 12: Factory Preset Display Modes

    英华软件专用 购买QQ:505966338 LM-729 Service Manual Rev: A 4.2 Factory Preset Display Modes VESA MODES Horizontal Vertical Nominal Sync Nominal Sync Nominal Pixel Mode Resolution Total Frequency Polarity Freq. Polarity Clock +/- 0.5kHz +/- 1 Hz (MHz) 640x480@60Hz 800 x 525 31.469...
  • Page 13: Power Supply Requirements

    英华软件专用 购买QQ:505966338 LM-729 Service Manual Rev: A 4.3 Power Supply Requirements 4.3.1 Input Requirements PARAMETER RANGE CONDITION Input AC Voltage 100 to 240VAC RMS Universal input full range Input Frequency 60Hz @ 100VAC to 50Hz @ 240VAC Input Current Less than 2.0 Amps RMS Input voltage 100 VAC RMS ;...
  • Page 14: Panel Specification

    英华软件专用 购买QQ:505966338 LM-729 Service Manual Rev: A 4.4 PANEL SPECIFICATION 4.4.1 Panel Feature -High contrast ratio, high aperture structure -TN(Twisted Nematic) mode -Wide viewing angle -High speed response -SXGA(1280 x 1024 pixels) resolution -Low power consumption -2 dual CCFTs(Cold Cathode Fluorescent Tube)
  • Page 15: Parameter Guide Line For Ccfl Inverter

    英华软件专用 购买QQ:505966338 LM-729 Service Manual Rev: A 4.4.4 Parameter guide line for CCFL Inverter INVERTER MAX BRINGTHNESS (Vadj:5.0v), LOAD=120K X4(ROOM TEMPERATURE 25 ITEM SYMBOL MIN. TYP. MAX. UNIT REMARK Input voltage 10.8 13.2 Input current 2250 2500 FOR 4 LOAD...
  • Page 16: Block Diagram

    英华软件专用 购买QQ:505966338 LM-729 Service Manual Rev: A 5. Block Diagram 5.1 Monitor Exploded View Page 16 of 61  Free Datasheet Download http://www.Chinadz.Com http://www.Icver.Com...
  • Page 17: Software Flow Chart

    英华软件专用 购买QQ:505966338 LM-729 Service Manual Rev: A 5.2 Software Flow Chart Page 17 of 61  Free Datasheet Download http://www.Chinadz.Com http://www.Icver.Com...
  • Page 18 英华软件专用 购买QQ:505966338...
  • Page 19: Electrical Block Diagram

    英华软件专用 购买QQ:505966338 LM-729 Service Manual Rev: A 5.3 Electrical Block Diagram 5.3.1 Main Board Interface (CN4/CN5) Scalar gm5126/gm2126 Flash Memory (Include MCU,ADC,OSD) W39f010P-70B (U6) (U4) Hsync, EPR_SDA Vsync EPR_SCL DVI-I only Control EEPROM D-Sub Connector Interface 24C16 Connector (CN1) (CN9)
  • Page 20: Inverter/Power Board

    英华软件专用 购买QQ:505966338 LM-729 Service Manual Rev: A 5.3.2 Inverter/Power Board Inverter Block Diagram P a ra lle t-re s o n a n t V in B u c k C o n n e c to r in v e rte r...
  • Page 22 MLL5232B 5.6V MLL5232B 5.6V MLL5232B 5.6V MLL5232B 5.6V MLL5232B 5.6V MLL5232B 5.6V MLL5232B 5.6V MLL5232B 5.6V...
  • Page 26 英华软件专用 购买QQ:505966338 LM-729 Service Manual Rev: A Remark: 1) MCU initialize. 2) Is the EEprom blank ? 3) Program the EEprom by default values. 4) Get the PWM value of brightness from EEprom. 5) Is the power key pressed ? 6) Clear all global flags.
  • Page 29 R227   2K 1/16W...
  • Page 30: Main Board

    英华软件专用 购买QQ:505966338 LM-729 Service Manual Rev: A 7. PCB Layout 7.1 Main Board Page 31 of 61 ...
  • Page 31 英华软件专用 购买QQ:505966338 LM-729 Service Manual Rev: A Page 32 of 61 ...
  • Page 32 英华软件专用 购买QQ:505966338...
  • Page 33 英华软件专用 购买QQ:505966338 LM-729 Service Manual Rev: A 7.3 Keypad Board and Audio board 1. Keypad Board Page 34 of 61 ...
  • Page 34: Audio Board

    英华软件专用 购买QQ:505966338 LM-729 Service Manual Rev: A 2.Audio Board Page 35 of 61 ...
  • Page 35 英华软件专用 购买QQ:505966338...
  • Page 36: Trouble Shooting

    英华软件专用 购买QQ:505966338 LM-729 Service Manual Rev: A 8.2 Trouble Shooting 8.2.1 Main Board 1.NO SCREEN APPEAR Measured CN11 pin5 = 12 V? Measured CN11 pin 9/10= 5V? Check Correspondent component. Is there any shortage or cold solder? Measured U8 pin 2= 3.3V? Measured U9 pin 2= 2.5V?
  • Page 37 英华软件专用 购买QQ:505966338 LM-729 Service Manual Rev: A 2.PANEL-POWER CIRCUIT Check the PPWR panel power relative circuit, check R203 should have response from 0V to 5V Q5, Q2(pin7,8) When we switch the power switch from on to off In normal operation, when LED =green, R203...
  • Page 38 英华软件专用 购买QQ:505966338 NG , no transition Measured DCLK(pin 15 or pin 16 from U4) DVS, DHS (pin 1,4 from U4 ) Is the waveform ok? DCLK around 48 MHZ , DVS=60.09Hz , DHS around 80 KHz ?(refer to input Replace GM5126 /2126 (U4) or signal=640x480@60 Hz 31k, and LED is replace MAINBOARD.
  • Page 39: Power/Inverter Board

    英华软件专用 购买QQ:505966338 LM-729 Service Manual Rev: A 8.2.2 Power/Inverter Board 1.) No power Repeating the start voltage Page 40 of 61  Free Datasheet Download http://www.Chinadz.Com http://www.Icver.Com...
  • Page 40 英华软件专用 购买QQ:505966338 LM-729 Service Manual Rev: A 2.) W / LED , No Backlight Check Q209/Q210/C213 or Q211/Q212/C214 Page 41 of 61  Free Datasheet Download http://www.Chinadz.Com http://www.Icver.Com...
  • Page 41: Keypad Board

    英华软件专用 购买QQ:505966338 LM-729 Service Manual Rev: A 8.2.3 KeyPad Board OSD is unstable or not working Connect KeyPad Board Is KeyPad Board connecting normally ? Replace Button Switch Is Button Switch normally ? Replace KeyPad Board Is KeyPad Board Normally ? Check Main Board Page 42 of 61 ...
  • Page 42: White-Balance, Luminance Adjustment

    英华软件专用 购买QQ:505966338 LM-729 Service Manual Rev: A 9. White-Balance, Luminance adjustment Approximately 30 minutes should be allowed for warm up before proceeding white balance adjustment. Before started adjust white balance ,please setting the Chroma-7120 MEM. channel 1 to 6500 color, MEM. channel 2 to 7800 color, ( our 6500 parameter is x = 313 ±10, y = 329 ±10, Y = 200 ±10 cd/m...
  • Page 43: Edit Content

    英华软件专用 购买QQ:505966338 LM-729 Service Manual Rev: A 10. EDIT Content A. D-SUB Connector (Analog) Note: Byte 0C, 0D, 0E, 0F means Serial No. Byte 10, 11 means Manufacture Time. Byte 7F means checksum B. DVI Connector (Digital) Note: Byte 0C, 0D, 0E, 0F means Serial No. Byte 10, 11 means Manufacture Time. Byte 7F means checksum Page 44 of 61 ...
  • Page 44: Bom List

    英华软件专用 购买QQ:505966338 LM-729 Service Manual Rev: A 11. BOM List AUPC780A5 AUDIO BOARD 1 PCS CBPC780KACAC CONVERSION BOARD 1 PCS CNPC780A2 CONVERSION BOARD 1 PCS KEPC780KB6 KEY BOARD 1 PCS PWPC7425B3 POWER BOARD 1 PCS 12L 408 4 SR600A66 1 PCS...
  • Page 45 英华软件专用 购买QQ:505966338 LM-729 Service Manual Rev: A 52L6025 11523 MYLAR 1 PCS 52L6025 11587 MYLAR 138X144 1 PCS 52L6025 11588 MYLAR 120X100 1 PCS 70L1600615 7A CD MANUAL 1 PCS 71L 100 21 CORE 1 PCS 71L 100 22 M4S SH 23*12*3...
  • Page 46 英华软件专用 购买QQ:505966338 LM-729 Service Manual Rev: A J203 95L 90 23 TIN COATED 0 PCS J204 95L 90 23 TIN COATED 0 PCS R207 61L 60210252T CFR 1K OHM+-5% 1/6W 1 PCS R208 61L 60210252T CFR 1K OHM+-5% 1/6W 1 PCS...
  • Page 47 英华软件专用 购买QQ:505966338 LM-729 Service Manual Rev: A 93L 22 53 CRYSTAL 14.318MHzHC-49U 1 PCS AIC780KACAC MAIN BOARD 33L8019 30 WAFER FH12-30S-0.5SH SM 1 PCS 33L8019 50 CONNECTOR 50P 1 PCS 56L 562 37 GM5126 1 PCS 56L 563 25 AIC1084-33CE T0-252...
  • Page 48 英华软件专用 购买QQ:505966338 LM-729 Service Manual Rev: A 61L0603102 CHIPR 1K OHM +-5% 1/16W 1 PCS 61L0603102 CHIPR 1K OHM +-5% 1/16W 1 PCS 61L0603103 CHIPR 10K OHM +-5% 1/16 1 PCS 61L0603103 CHIPR 10K OHM +-5% 1/16 1 PCS 61L0603103...
  • Page 49 英华软件专用 购买QQ:505966338 LM-729 Service Manual Rev: A 61L0603472 CHIPR 4.7K OHM +-5% 1/1 1 PCS 61L0603750 CHIPR 75 OHM+-5% 1/16W 1 PCS 61L0603750 CHIPR 75 OHM+-5% 1/16W 1 PCS 61L0603750 9F 75OHM 1% 1 PCS 61L0603750 9F 75OHM 1% 1 PCS...
  • Page 50 英华软件专用 购买QQ:505966338 LM-729 Service Manual Rev: A 65L0603104 12 0.1UF +-10% 16V X7R 1 PCS 65L0603104 12 0.1UF +-10% 16V X7R 1 PCS 65L0603104 12 0.1UF +-10% 16V X7R 1 PCS 65L0603104 12 0.1UF +-10% 16V X7R 1 PCS 65L0603104 12 0.1UF +-10% 16V X7R...
  • Page 51 英华软件专用 购买QQ:505966338 LM-729 Service Manual Rev: A 67L 312220 3 SMD 22UF +-20% 16V 1 PCS 67L 312220 3 SMD 22UF +-20% 16V 1 PCS 67L 312220 3 SMD 22UF +-20% 16V 1 PCS 67L 312220 3 SMD 22UF +-20% 16V...
  • Page 52 英华软件专用 购买QQ:505966338 LM-729 Service Manual Rev: A 93L 39151 MMSZ5248B-SMT 1 PCS 93L 39151 MMSZ5248B-SMT 1 PCS 93L 39151 MMSZ5248B-SMT 1 PCS 93L 39151 MMSZ5248B-SMT 1 PCS 93L 39151 MMSZ5248B-SMT 1 PCS 93L 39151 MMSZ5248B-SMT 1 PCS 93L 39151 MMSZ5248B-SMT...
  • Page 53 英华软件专用 购买QQ:505966338 LM-729 Service Manual Rev: A SW101 77L 604 1 TO CHIP TACT SW 1 pcs SW102 77L 604 1 TO CHIP TACT SW 1 pcs SW103 77L 604 1 TO CHIP TACT SW 1 pcs SW104 77L 604 1 TO...
  • Page 54 英华软件专用 购买QQ:505966338 LM-729 Service Manual Rev: A C227 65L 3J2206EM 22PF 5% 3KV MURATA 0 PCS C229 65L 3J2206EM 22PF 5% 3KV MURATA 0 PCS C215 65L 3J2206ET 22PF 5% 3KV TDK 1 PCS C218 65L 3J2206ET 22PF 5% 3KV TDK...
  • Page 55 英华软件专用 购买QQ:505966338 LM-729 Service Manual Rev: A F901 84L 7H200 NL 5.2X20 FUSE 0 PCS F901 84L 7H200 SL 250V/2A LIHEL FUSE 0 PCS CN301 88L 30210K E PHONE JACK 1 PCS BD901 93L 50460 8 BRIDGE 2KBP06M 1 PCS...
  • Page 56 英华软件专用 购买QQ:505966338 LM-729 Service Manual Rev: A R917 61L 17210052T 100HM 5% 1/4W 1 PCS R243 61L 17210252T 1K OHM 5% 1/4W 1 PCS R244 61L 17210252T 1K OHM 5% 1/4W 1 PCS R918 61L 17210352T CFR 10KOHM +-5% 1/4W...
  • Page 57 英华软件专用 购买QQ:505966338 LM-729 Service Manual Rev: A D207 93L 64 1152T 1N4148 1 PCS D208 93L 64 1152T 1N4148 1 PCS D209 93L 64 1152T 1N4148 1 PCS D210 93L 64 1152T 1N4148 1 PCS D903 93L 64 1152T 1N4148...
  • Page 58 英华软件专用 购买QQ:505966338 LM-729 Service Manual Rev: A Q207 57L 417 6 PMBS3906/PHILIPS-SMT(06 1 PCS Q208 57L 417 6 PMBS3906/PHILIPS-SMT(06 1 PCS Q202 57L 760 4 DTA144WKA BY ROHM SMT(7 1 PCS Q201 57L 760 5 DTC144WKA BY ROHM SMT(8 1 PCS...
  • Page 59 英华软件专用 购买QQ:505966338 LM-729 Service Manual Rev: A C910 65L0805104 32 CHIP 0.1UF 50V X7R 1 PCS C927 65L0805104 32 CHIP 0.1UF 50V X7R 1 PCS C203 65L0805105 27 CHIP 1UF 25V Y5V 0805 1 PCS C209 65L0805105 27 CHIP 1UF 25V Y5V 0805...
  • Page 60 英华软件专用 购买QQ:505966338 LM-729 Service Manual Rev: A D912 93L 60236 DIODE FMB26L SANKEN 0 PCS M1L1730 8128 SCREW M3x8 2 PCS 705L780KB34 28 CAB'T ASS'Y 5L6012 1 LIFT-RUBBER 1 PCS 12L 394 3 FOOT-PORON 6 PCS 15L5925 2 BASE-BKT 1 PCS...

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